Convert array to identity object

JavaScript, Array · Apr 16, 2023

Converts an array of values into an object with the same values as keys and values.

Use Array.prototype.map() to map each value to an array of key-value pairs.
Use Object.fromEntries() to convert the array of key-value pairs into an object.

const toIdentityObject = arr => Object.fromEntries(arr.map(v => [v, v]));

toIdentityObject(['a', 'b']); // { a: 'a', b: 'b' }

Written by Angelos Chalaris

I'm Angelos Chalaris, a JavaScript software engineer, based in Athens, Greece. The best snippets from my coding adventures are published here to help others learn to code.

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